Amassless rigid rod, 50 cm long, carris a litle ball of mass 2 kg at one end. at the other a motor makes it rotate in a vertical plane at 30 rev/min. when the ball is at the bottom of its circular trajectory, what is the magnitude of the tension in the rod? (a) 10 n (b)20 n (c)30 n (d)40 n (e)50 n

yup its correct its: c) b b

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.